The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 20, 1976
Filed:
Jan. 09, 1975
Paul L Day, Parma, OH (US);
Park-Ohio Industries, Inc., Cleveland, OH (US);
Abstract
A method and apparatus for inductively heating the axial, generally circular end of at least two elongated workpieces having central axes wherein the ends terminate in generally flat surfaces perpendicular to the axes. The method and apparatus includes locating the workpieces in side-by-side relationship with the axial ends facing a given direction and the respective axes being generally parallel, providing generally circular inductors matching each of the ends of the workpieces and normally spaced axially therefrom, moving the inductors axially of the workpieces until each of the inductors contacts the flat surface of one of the axial ends, locking the inductors with respect to each other, retracting the locked inductors axially away from the flat surfaces a selected air gap distance, rotating the workpiece about the axes and energizing the inductors to inductively heat the axial ends of the workpieces preparatory to hardening.